Double-stair-grate continuous kiln.



A. W. P. WBYERS.

DOUBLE. sum GRATE commuons KILN.

APPLICATION FILED APR. 10, 1913.

1,102,970. Patented July 7, 1914 2 SHEETS-SHEET 1.

N/T/vE5 E5. .ZNVENTDR. My ALB/5 NEWEYE 5.

THE NORRIS PETERS CO" PHOTOLITHO WASHINGTON. D C.

A. W. F. WEYERS.

DOUBLE sum GRATE commuous KILN.

APPLICATION FILED APR. 10, 1913.

1,102,970, Patented July 7, 1914.

2 SHEETS-SHEET 2.

B MW

THE NORRIS PETERS CO.. PHOTO-LITHQ. WASHINGTON, D, C.

UNTT STATES PATENT OFFICE.

ALOIS WILLIAM FRANCIS WEYERS, OF NEW WESTMIN$TEQ BRITISH COLUMBIA,.

CANADA.

DOUBLE-STAIR-GRATE CONTINUOUS KILN.

ioaeao.

Specification of Letters Patent.

To all whom it may concern Be it known that I, ALoIs WILLI M FRAN- oIs VVEYERS, of the city of New Westminster, in the Province of British Columbia, Canada, have invented certainnew and useful Improvements in Double-Stair-Grate Continuous Kilns, of which the following is a specification.

My invention relates to improvements in double stair grate continuous kilns, and the object of my invention is to devise a kiln in which all kinds of high and low grade clay products can be burned, and which shall burn these products evenly throughout from top to bottom, and thus produce a more uniform and higher class product than has hitherto been obtainable in ordinary kilns and with a greatly decreased consumption'of fuel.

I attain thi object by the construction illustrated in the accompanying drawings in which Figure 1, is a transverse sectional elevation of the kiln apartments, on the line lVW in Fig. 3. Fig. 2, is a part longitudinal sectionalelevation on the line X-X in Fig. 1. Fig. 8, is a sectional plan on the line V-V in Fig. 1, showing four apartments of. the kiln, side, and main flue. Fig. 4, is a view of the top step of the stair grate. Fig. 5, is a view of one of the lower steps of the stair grates, showing the part cut away in the raised edge. Fig. 6, is a perspective view of the grates showing the method" of supporting the steps. Fig.7, is a plan detail of a pair of steps and their support.

Similar letters refer to similar parts throughout the several views.

The nature of my invention is as ,follows :It consists of a continuous kiln with apartments having a cross section similar to that shown in Fig. 1, in which A is the space for receiving and burning the products, B the side walls, and C is the arch of the roof. The upper part of the roof is constructed as shown, with longitudinal recesses D, which are filled in with sand. The several apartments A of the kiln are each complete in" themselves, and areconnected with each other by the openings E in the side walls B, and the side flues 0, making the kiln a continuous one, and thus utilizing the heat produced in the apartmentsto the very extreme. The back end of each apartment is closed by a wall Q in Fig. 3, be-

tween which walls the main flue Y runs. at 7 any convenient height while the front end which access may be had to their interiors, as shown in Fig.

The grates are constructed in upper and lower tiers, the upper being arranged in staggered relation with respect to the lower, as clearly shown in Figs. 1 and 2 of the drawings, each apartment containing an upper and lower grate. The upper grate F, and the lower grate Gr, are built in the form of stairs, in which H represents the steps of the upper grate F, and J represents the steps of the lower grate G. These steps, H and J are removable, and rest, in the Patented'July 7, 1914;. Application filed. April 10, 1913. Serial No. 760,176. i

upper grate, 0n the outer face of the grate and the side wall B, and in the lower grate, on the outer face of the lower grate and the outer face of the upper grate. The inner ends of the steps are as shown in Fig. 4 and Fig. 5, and rest in notchesF in the upper I grate, and Gr in the lower grate formed in the aforesaid faces and side walls, as shown in Fig. 6, while the outer ends of the steps are made with a raised edge, and cut away as shown in Fig. 5. These outer ends also rest on the faces F and G of the grates. in a similar manner to the inner ends, and are cut away as shown to allow of their engagkeep the stepsin place.

the fuel from spilling over as it isfed'on to the steps. The uppermost step of all in each grate, is made with'its outer raised edge continuous, as shown in Fig.4. The grates F and G aremade of fireclay, and their steps H and J may be made perforated, as

shown in Figs. 4. and 5, or solid, according to the size and quality of the coal itis de-. sired to use in the working of the kiln. The upper grates F and the lower grates G may be used entirely independent of each other, since, if it is only required to use the upper set of grates, the fire would only be maintained thereon, and vice versa, if it were only necessary to use the lower set of grates, the firev would only be kept on them, while if both sets of grates were to be used together, the fires would be maintained on both of them. The separate openings K and L, for the fuel supply, makes the grates in dependent of each other, since the openings K only feed the upper grates, and the 6pm:

ing behind the outer faces of the grates to The raised edges are formed for thepurpose of preventing ings L the lower grates. For different kinds of clay products the fire bridge can be arranged open or closed between the grates; For example, for burning hollowware, such as drain and sewer pipes and the like, it is preferable to direct the flame upward, in which case the fire bridges would.

be closed. 1 This is done by building a wall of fire brick between the outer faces of the grates, as shown, F and G inFig. 6. This wall is ofequal thickness to. the outer face andyincloses the fire, so that the flame, in.- stead ofspreading outwardly, will be directed; upward. Small holes, F in Fig. 6, are left in the walls F G thus. built, in

v the way of the inclined bridges M, to allow which connect one row of apartments with of the fuel being fed to the lower grates.

To provide for feeding the coal on to the grates, the openings K and are constructed in the roof, running from the upper side of the roof to the inside of the arch 0, each opening being situated directly in line with the center line of the grates. The coal pass: ingthrough the openings L, to supiplythe on tov the upper step of the grates-F and fromv there it spreads down and on to the lower steps of thesegrates, while that pass: ingthrough the openings L, to supply the grates G, falls on to; the inclined steps M,

and from there, to the upper steps of; the grates (hand from thereto the lower steps. Through the openings E in the side walls, B the necessary air for combustion passes, from one'apartment to another, while a con-, tinuous circulation of heat through the entire kiln is providedfor. by the side flues O,

the. other. The flue gases pass through the opening N in the roof,- of the apartments, and escape into the main flue Y, which runs between the rows .of apartments, as

' shown in Fig. 3. The openings. N are con nected with this main line by suitable pipes, which can be removed at will.

F isa metal reservoir for holding water with pipe pconnectionslt runn ng fromit to.

the openings E by way of the holes S in the side walls B. i This reservoir P is placed, full of water, in one of the openings N,

after'the eduction pipe therefrom has. been removed, inithe apartment lastburned and adjacent to the apartment which is to be burned. The cocks in the'pipe connections 3 v are; opened when burning is taking place,

and the water then passes from thereservoir P, which isalways kept full, to the openings E andthrough them to the. space T under I neath the grates F. Inthisspace the water becomes steam, and coming in contact with ,the'fuelgases and combustion air, circulates through and "over the gratesF and G, thus preventing the coal from forming clinker on the grates, The openings Uare provided to allow the steanito'pa-ss from thespace T to underneath the grates Itwill be "been obtainable atthe same cost.

seen, therefore, thata perfect control of the temperature of the kiln can be had,

which control is necessary to secure a-per fectly burned and uniform product- By the use of the double stair grate this uniformity of temperature can be regulated as required, as the lower grates provide that it is not necessary to burn faster and'more severe on the upper grates than is wanted in order to burn the upper part of the kiln sufficiently, and further, the fuel consumption is reduced to a minimum, as the heat produced from the coal is utilized to the fuel. is applied and utilized to the utmost advantage. A further advantage is, that the steps of the grates being removable;

they can, be taken out and changed very quickly, if necessary, this is also a great '(BOHVGIIIGDCG for cleaning the grates.

The double stair grate can be fixed to any previously built continuous kiln of any type;

It will, of course, be understood that to open and close the fire bridges or the space,

between the several grates; allthat is done is when the space isto be closed for the pure pose of sending flames up, to merely takesome fire brick and close the space by a wall. The fire bridges may then be termed closed while they would be open when there is no wall built. I

What I claim as my invention is: 1. In a continuous kiln, a number of; in. dependent adjoining apartments with in tervening walls between them, passages in said walls to connect said adjoiningapart. .ments with each other, openlngs intheroofs of said apartments for escape of; fuel gases, pipes connecting S2t1d'0p811111gS to a; mam

flue, two sets of stair grates in staggered relation' in each of said apartments andmeans. for supplying fuel to said grates, all substantially as set, forth. Q

2. In 'acontinuous kiln, a number of in.-

terveningwalls between them, side fines connecting a series of said ad o1n1ng apartments with another series of adjoining apartments,

a series ofupper stairgrates contained within each said independent ad ining apartments, a series of lower stair grates,

contained within each saidindependent adjcining apartment, said lower stair grates dependent adjoining apartments with inbeing adjacent to said upper stair grates, but separable therefrom and set in staggered relation thereto, feed openings for supplying fuel to said upper and lower stair grates, all substantially as set forth.

3. In a continuous kiln, independent adjoining apartments with intervening, walls between them, upper and lower stair grates in staggered relation in each of said apartments, steps for said grates adapted to be detachably supported in step-receiving notches formed in the supporting walls of said grates, and means for supplying fuel g0 dsaid steps, as and for the purpose speci- 4. In a continuous kiln, independent adjoining apartments with intervening walls between them, upper and lower stair grates in staggered relation in each of said apartments, steps for said grates adapted to be detachably supported in step-receiving notches formed in the supporting walls of said grates, means for preventing longitudinal displacement of said steps, and means for supplying fuel to said steps, as and for the purpose specified.

5. In a continuous kiln, independent adjoining apartments with intervening walls between them, upper and lower stair grates in staggered relation in each of said apartments, said grates having step-receiving notches formed in their supporting walls, steps for said grates adapted to be slidably engaged into the said notches, the said steps having their outer ends upwardly turned whereby the fuel may be prevented from spilling over the ends of the said steps, and means for supplying fuel to said steps, as and for the purpose specified.

Dated at Vancouver, 13. 0. this 29th day of January, 1913.

ALOIS WILLIAM FRANCIS WEYERS.

Witnesses:

FREDERICK Gnonsn TANNER LUCAS, JAMES TAYLOR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of intents,

Washington, D. 0-" 

